López-Martín Raúl, Rodrigo Imanol, Ballesta Carlos, Arias Armando, Mas Antonio, Santos Burgos Benito, Normile Peter S, De Toro Jose A, Binns Chris
Instituto Regional de Investigación Científica Aplicada (IRICA), 13005 Ciudad Real, Spain.
Departamento de Física Aplicada, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain.
Nanomaterials (Basel). 2022 Aug 3;12(15):2662. doi: 10.3390/nano12152662.
Cloth used for facemask material has been coated with silver nanoparticles using an aerosol method that passes pure uncoated nanoparticles through the cloth and deposits them throughout the volume. The particles have been characterized by electron microscopy and have a typical diameter of 4 nm with the atomic structure of pure metallic silver presented as an assortment of single crystals and polycrystals. The particles adhere well to the cloth fibers, and the coating consists of individual nanoparticles at low deposition times, evolving to fully agglomerated assemblies in heavy coatings. The cloth was exposed to Usutu virus and murine norovirus particles in suspension and allowed to dry, following which, the infectious virus particles were rescued by soaking the cloth in culture media. It was found that up to 98% of the virus particles were neutralized by this contact with the silver nanoparticles for optimum deposition conditions. The best performance was obtained with agglomerated films and with polycrystalline nanoparticles. The work indicates that silver nanoparticles embedded in masks can neutralize the majority of virus particles that enter the mask and thus increase the opacity of masks to infectious viruses by up to a factor of 50. In addition, the majority of the virus particles released from the mask after use are non-infectious.
用于口罩材料的布料已采用气溶胶法涂覆了银纳米颗粒，该方法使纯的未涂覆纳米颗粒穿过布料并将它们沉积在整个布料中。这些颗粒已通过电子显微镜进行了表征，其典型直径为4纳米，纯金属银的原子结构呈现为单晶和多晶的组合。颗粒与布料纤维粘附良好，在低沉积时间时涂层由单个纳米颗粒组成，在厚涂层中则演变为完全团聚的聚集体。将布料暴露于悬浮液中的乌苏图病毒和鼠诺如病毒颗粒中并使其干燥，然后通过将布料浸泡在培养基中来挽救感染性病毒颗粒。结果发现，在最佳沉积条件下，与银纳米颗粒的这种接触可中和高达98%的病毒颗粒。团聚膜和多晶纳米颗粒的性能最佳。这项工作表明，嵌入口罩中的银纳米颗粒可以中和进入口罩的大部分病毒颗粒，从而使口罩对感染性病毒的不透明度提高多达50倍。此外，使用后从口罩释放的大多数病毒颗粒没有传染性。
